Iozone: Performance Test of File I/O Version $Revision: 3.483 $ Compiled for 64 bit mode. Build: linux-AMD64 Contributors:William Norcott, Don Capps, Isom Crawford, Kirby Collins Al Slater, Scott Rhine, Mike Wisner, Ken Goss Steve Landherr, Brad Smith, Mark Kelly, Dr. Alain CYR, Randy Dunlap, Mark Montague, Dan Million, Gavin Brebner, Jean-Marc Zucconi, Jeff Blomberg, Benny Halevy, Dave Boone, Erik Habbinga, Kris Strecker, Walter Wong, Joshua Root, Fabrice Bacchella, Zhenghua Xue, Qin Li, Darren Sawyer, Vangel Bojaxhi, Ben England, Vikentsi Lapa, Alexey Skidanov, Sudhir Kumar. Run began: Wed Mar 4 21:46:02 2026 Auto Mode Machine = Linux oleg205-client.virtnet 4.18.0rh8.10-debug #2 SMP Mon Jul 14 01 Excel chart generation enabled Excel chart generation enabled Verify Mode. Pattern dbdbdbdb Performance measurements are invalid in this mode. Using maximum file size of 102400 kilobytes. Using Maximum Record Size 512 kB Command line used: iozone -a -M -R -V 0xab -g 100M -q 512k -i0 -i1 -f /mnt/lustre/d4.lustre-rsync-test/d0.iozone-oleg205-client.virtnet/iozone-file Output is in kBytes/sec Time Resolution = 0.000001 seconds. Processor cache size set to 1024 kBytes. Processor cache line size set to 32 bytes. File stride size set to 17 * record size. random random bkwd record stride kB reclen write rewrite read reread read write read rewrite read fwrite frewrite fread freread 64 4 9112 16588 149896 129254 64 8 12898 34148 435202 438043 64 16 15202 56778 666414 591520 64 32 16153 67944 703068 392561 64 64 11250 74177 939223 929467 128 4 12459 18618 159982 126596 128 8 19161 37982 342216 412721 128 16 23969 55411 441213 448961 128 32 25739 78434 748976 486381 128 64 32248 117533 1172704 640042 128 128 24820 105708 1363288 1032829 256 4 14006 19448 215273 192917 256 8 21869 32068 362162 278257 256 16 27041 53011 484801 556687 256 32 26328 62869 626159 613985 256 64 21682 82476 933846 744204 256 128 38589 126608 1080434 1479379 256 256 33233 124206 1356067 1561112 512 4 14207 18194 85431 167095 512 8 23157 30878 304572 326325 512 16 21281 45366 371549 347556 512 32 42317 72562 863551 532239 512 64 34747 77622 811349 711133 512 128 47593 121122 912345 1316016 512 256 49854 111890 1239310 1672748 512 512 64240 152793 1778004 2047551 1024 4 15770 17840 192480 164970 1024 8 28940 28564 331278 240711 1024 16 43133 62208 444070 562919 1024 32 49763 87581 814087 878171 1024 64 61720 106954 878351 879790 1024 128 57745 113967 1267024 959810 1024 256 65302 153480 1961346 1622698 1024 512 73410 137045 1570483 1845071 2048 4 15502 17513 125945 165858 2048 8 25462 32972 261022 248941 2048 16 36798 48208 449715 458476 2048 32 62645 77725 583642 688417 2048 64 64585 91567 975263 971074 2048 128 78042 119577 1111274 1192085 2048 256 95393 117424 1386635 1330781 2048 512 84961 150767 2054120 1370922 4096 4 16010 17458 167600 163657 4096 8 25638 32510 295055 295955 4096 16 39003 51269 536404 404748 4096 32 59159 77505 859388 836621 4096 64 80173 85138 1195553 910249 4096 128 76740 137371 1248736 1072213 4096 256 85953 129587 1492240 1154188 4096 512 113670 137635 1676607 1647663 8192 4 16455 17129 166196 159025 8192 8 27644 31692 327773 281406 8192 16 43675 51139 505864 495855 8192 32 62288 80437 730781 705845 8192 64 75986 98364 1020945 793256 8192 128 83547 131731 1364412 1091277 8192 256 80561 123323 1509800 1414865 8192 512 99006 126059 1543577 1474173 16384 4 15619 16054 146898 143589 16384 8 27126 29651 286699 258732 16384 16 44263 48803 480311 490980 16384 32 59000 70846 794419 576637 16384 64 71140 99331 1058544 969124 16384 128 74604 95032 1002138 793877 16384 256 89003 116412 1630904 1254902 16384 512 84084 122597 1484869 1498566 32768 4 16434 18281 171140 168400 32768 8 28039 35441 357023 352871 32768 16 52900 57679 648126 524690 32768 32 71720 86676 1071725 864728 32768 64 87704 107794 1064726 1054960 32768 128 100118 126926 1422162 1373513 32768 256